SINGAPORE, Oct 1 —  The number of dengue cases reported in Singapore last week fell for the seventh straight week but the mosquito population has risen in the last three weeks, the National Environment Agency (NEA) said yesterday.

There were 593 dengue cases reported last week, a drop of 78 cases from the week before.

As of September 29, there have been 30,431 reported cases of dengue this year.

The weekly number of reported dengue cases has dropped 56 per cent in the past seven weeks, while the number of dengue clusters has declined by 48 per cent in the same period.

But NEA said its Gravitrap surveillance system, which monitors the Aedes aegypti mosquito population at residential areas, has detected a 12 per cent rise in the mosquito population over the last three weeks.

The number of dengue clusters islandwide has decreased to 195, which is 11 fewer than a week ago. These dengue clusters were closed: